Method and apparatus for transmitting and receiving sidelink data in communication system

Abstract

Disclosed are a method and an apparatus for transmitting and receiving sidelink data in a communication system. Then operation method of a first terminal includes generating a first stage SCI including first information indicating a number of layers for transmission of sidelink data and transmitting the first stage SCI to a second terminal. The sidelink data is then transmitted to the second terminal through one or more layers indicated by the first information included in the first stage SCI.

What is claimed is: 
     
         1 . An operation method of a first terminal in a communication system, the operation method comprising:
 generating a first stage sidelink control information (SCI) including first information indicating a number of layers for transmission of sidelink data;   transmitting the first stage SCI to a second terminal; and   transmitting the sidelink data to the second terminal through one or more layers indicated by the first information included in the first stage SCI,   wherein the first information, upon being set to a first value, indicates one layer,   wherein the first information, upon being set to a second value, indicates two layers, and   wherein a first transmission scheme for a second stage SCI is configured independently from a second transmission scheme for the sidelink data, the first transmission scheme is a rate matching scheme applied to the second stage SCI, and the second transmission scheme is a rate matching scheme applied to the sidelink data.   
     
     
         2 . The operation method according to  claim 1 , wherein the number indicated by the first information corresponds to a number of demodulation reference signal (DMRS) ports for the sidelink data. 
     
     
         3 . The operation method according to  claim 1 , further comprising receiving, from a base station, information of a first table indicating a number of layers supported in sidelink communication, wherein the first information indicates the number selected from the first table. 
     
     
         4 . The operation method according to  claim 1 , further comprising transmitting the second stage SCI to the second terminal through the one or more layers indicated by the first information included in the first stage SCI. 
     
     
         5 . The operation method according to  claim 1 , wherein the first stage SCI further includes second information indicating the first transmission scheme of the second stage SCI, and the second transmission scheme of the sidelink data is identical to the first transmission scheme indicated by the second information. 
     
     
         6 . The operation method according to  claim 1 , wherein the first stage SCI further includes fourth information indicating both of the first transmission scheme of the second stage SCI and the second transmission scheme of the sidelink data. 
     
     
         7 . The operation method according to  claim 1 , further comprising transmitting, to the second terminal, the second stage SCI including third information indicating the second transmission scheme of the sidelink data, wherein the sidelink data is transmitted based on the second transmission scheme indicated by the third information. 
     
     
         8 . An operation method of a second terminal in a communication system, the operation method comprising:
 receiving a first stage sidelink control information (SCI) from a first terminal;   identifying a number of layers for transmission of sidelink data, which is indicated by first information included in the first stage SCI; and   receiving the sidelink data from the first terminal through one or more layers indicated by the first information included in the first stage SCI,   wherein the first information, upon being set to a first value, indicates one layer,   wherein the first information, upon being set to a second value, indicates two layers, and   wherein a first transmission scheme for a second stage SCI is configured independently from a second transmission scheme for the sidelink data, the first transmission scheme is a rate matching scheme applied to the second stage SCI, and the second transmission scheme is a rate matching scheme applied to the sidelink data.   
     
     
         9 . The operation method according to  claim 8 , wherein the number indicated by the first information corresponds to a number of demodulation reference signal (DMRS) ports for the sidelink data. 
     
     
         10 . The operation method according to  claim 8 , further comprising receiving from a base station information of a first table indicating a number of layers supported in sidelink communication, wherein the number indicated by the first information belongs to the first table. 
     
     
         11 . The operation method according to  claim 8 , further comprising receiving the second stage SCI from the first terminal through the one or more layers indicated by the first information included in the first stage SCI. 
     
     
         12 . The operation method according to  claim 8 , wherein the first stage SCI further includes second information indicating the first transmission scheme of the second stage SCI, and the second transmission scheme of the sidelink data is identical to the first transmission scheme indicated by the second information. 
     
     
         13 . A first terminal in a communication system comprising:
 a processor; and   a memory storing at least one instruction executable by the processor,   wherein the at least one instruction causes the first terminal to:   generate a first stage sidelink control information (SCI) including first information indicating a number of layers for transmission of sidelink data;   transmit the first stage SCI to a second terminal; and   transmit the sidelink data to the second terminal through one or more layers indicated by the first information included in the first stage SCI,   wherein the first information, upon being set to a first value, indicates one layer,   wherein the first information, upon being set to a second value, indicates two layers, and   wherein a first transmission scheme for a second stage SCI is configured independently from a second transmission scheme for the sidelink data, the first transmission scheme is a rate matching scheme applied to the second stage SCI, and the second transmission scheme is a rate matching scheme applied to the sidelink data.   
     
     
         14 . The first terminal according to  claim 13 , wherein the number indicated by the first information corresponds to a number of demodulation reference signal (DMRS) ports for the sidelink data. 
     
     
         15 . The first terminal according to  claim 13 , wherein the at least one instruction further causes the first terminal to receive, from a base station, information of a first table indicating a number of layers supported in sidelink communication, wherein the first information indicates the number selected from the first table. 
     
     
         16 . The first terminal according to  claim 13 , wherein the at least one instruction further causes the first terminal to receive, from a base station, information of a second table indicating transmission schemes supported in sidelink communication, wherein the first stage SCI further includes second information indicating the first transmission scheme selected from the second table. 
     
     
         17 . The first terminal according to  claim 16 , wherein the second information indicates a transmission scheme of the second stage SCI, and the second transmission scheme of the sidelink data is identical to the first transmission scheme indicated by the second information. 
     
     
         18 . The first terminal according to  claim 16 , wherein the second information indicates the second transmission scheme of the sidelink data, and the sidelink data is transmitted based on the first transmission scheme indicated by the second information.